Swell index, oedopermeametric, filter press and rheometric tests for identifying the qualification of bentonites used in GCLs
Résumé
Geosynthetic clay liners (GCLs) are used in landfill liner applications and there is a need for a better control of the features of the bentonite in the GCL received on site, particularly in the European context where a wide variety of bentonites can be encountered. This paper presents the results of a project aiming at a rapid identification of the nature of the bentonite in a given GCL. The interaction between the bentonite and the fluid is increased by producing dispersions then testing its structuration in less than a few hours with filter press tests and flow curves. The results of those tests are intersected with swell index tests, electrical conductivity values and oedopermeametric tests.
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